DEVICE OVERVIEW
The PIC16(L)F720/721 devices are covered by this data sheet. They are available in 20-pin packages.
Figure 1-1 shows a block diagram of the PIC16(L)F720/721 devices. Table 1-1 shows the pinout descriptions.

High-Performance RISC CPU:
• Only 35 Instructions to Learn:
   - All single-cycle instructions except branches
• Operating Speed:
   - DC – 16 MHz oscillator/clock input
   - DC – 250 ns instruction cycle
• Up to 4K x 14 Words of Flash Program Memory
• Up to 256 bytes of Data Memory (RAM)
• Interrupt Capability
• 8-Level Deep Hardware Stack
• Direct, Indirect and Relative Addressing modes
• Processor Self-Write/Read access to Program Memory

Special Microcontroller Features:
• Precision Internal Oscillator:
   - 16 MHz or 500 kHz operation
   - Factory calibrated to ±1%, typical
   - Software tunable
   - Software selectable ÷1, ÷2, ÷4 or ÷8 divider
• Power-Saving Sleep mode
• Industrial and Extended Temperature Range
• Power-on Reset (POR)
• Power-up Timer (PWRT)
• Brown-out Reset (BOR)
• Multiplexed Master Clear with Pull-up/Input Pin
• Programmable Code Protection
• In-Circuit Serial ProgrammingTM (ICSPTM) via Two Pins
• 128 Bytes High-Endurance Flash:
   - 100,000 write Flash endurance (minimum)
• Wide Operating Voltage Range:
   - 1.8V to 5.5V (PIC16F720/721)
   - 1.8V to 3.6V (PIC16LF720/721)
  
Low-Power Features:
• Standby Current:
   - 40 nA @ 1.8V, typical
• Low-Power Watchdog Timer Current:
   - 500 nA @ 1.8V, typical

Peripheral Features:
• Up to 17 I/O Pins and 1 Input-only Pin:
   - High-current source/sink for direct LED drive
   - Interrupt-on-change pins
   - Individually programmable weak pull-ups
• A/D Converter:
   - 8-bit resolution
   - 12 channels
   - Selectable Voltage reference
• Timer0: 8-Bit Timer/Counter with 8-Bit Programmable Prescaler
• Enhanced Timer1
   - 16-bit timer/counter with prescaler
   - External Gate Input mode with toggle and single shot modes
   - Interrupt-on-gate completion
• Timer2: 8-Bit Timer/Counter with 8-Bit Period Register, Prescaler and Postscaler
• Capture, Compare, PWM module (CCP)
   - 16-bit Capture, max resolution 12.5 ns
   - 16-bit Compare, max resolution 250 ns
   - 10-bit PWM, max frequency 15 kHz
• Addressable Universal Synchronous
   Asynchronous Receiver Transmitter (AUSART)
• Synchronous Serial Port (SSP)
   - SPI (Master/Slave)
   - I2CTM (Slave) with Address Mask